Roscoe Tanner (born October 15, 1951) is a retired American tennis player, who turned professional in 1972 and reached a career-high singles ranking of world No.
4 on July 30, 1979.
Tanner was famous for his big left-handed serve, which was clocked at 153 mph at Palm Springs in 1978 during the final against Raúl RamÃrez.
He is also known for winning the men's singles title at the first of two Australian Open tournaments held in 1977.
Tanner won the tournament held in January, Vitas Gerulaitis won the December tournament.
Tanner reached the Wimbledon final in 1979, losing to Björn Borg in five sets.
Tanner was in the news in the 2000s for legal problems that included stretches of imprisonment, arrests for missing child support payments, allegations of financial misdeeds, and bankruptcy.